Re: fuel primer bulb leaking down
The fuel hose primer bulb should get hard when you pump it up by hand-usually when first starting a cold engine each day. Once the engine runs and starts to draw fuel through the hose, the bulb will soften up-but it should not collapse on itself. If started regularly throughout a few hour period, you should not have to re-prime the hose bulb. Prime the hose bulb till hard, then check for any fuel leaks between the bulb and the carbs, as High Trim indicated. If any fuel leaks out, air can leak in. If you are running on a built-in tank, check the anti-siphon valve for debris around the ball valve.
